Controllers | KA7500C

可编程频率最高可达 300khz 的 PWM 控制器

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KA7500C 用于脉宽调制开关稳压器的控制电路。KA7500C 由 5V 参比电压电路、两个误差放大器、触发器、输出控制电路、PWM 比较器、死区时间比较器和振荡器组成。此器件可在 1kHz 至 300kHz 的开关频率下运行。参比电压 (VREF) 精度通过微调提高到了 ±1%。这就提供了更好的输出电压调节。运行温度范围为 -25°C - +85°C

  • 其他消费型电子
  • 内部调节器提供一个稳定的 5 V参考电压，精度调整到 ±1%
  • 200 mA灌电流或源电流时的非专用输出 TR
  • 推挽式或单端运行时的输出控制
  • 通过死区时间控制（引脚 4）完整 PWM 控制电路实现可变占空比
  • 片内振荡器，提供主或从工作模式
  • 内部电路防止任一输出的双重脉冲

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